Frequently Asked Questions About Kenworth T680 Elbows, Piping & Comp.

What material options are available for T680 exhaust elbows, and which is best for my application?

Most T680 exhaust elbows come in either aluminized steel or 304 stainless steel. Aluminized steel offers good corrosion resistance at a lower price point and works well for most highway applications. Stainless steel provides superior longevity and heat resistance, making it ideal for vocational trucks, coastal regions, or heavy-duty applications. Chrome-plated options are also available for show trucks. Consider your operating environment and budget when choosing materials.

Will these exhaust components fit my specific T680 model year?

T680 exhaust components typically fit models from 2013 to present, but there are important variations. Pre-2017 models may have different mounting brackets and pipe routing compared to 2017+ models due to emissions updates. Always verify your specific engine type (PACCAR MX-13, Cummins ISX15, or X15) as pipe diameters and angles can differ. Check your existing pipe diameter - most T680s use 5-inch systems, but some configurations may have 4-inch components.

Can I install these exhaust components myself, or do I need special tools?

Basic exhaust elbow replacement can be done with standard hand tools including wrenches, sockets, and penetrating oil for stubborn clamps. However, you'll need proper jack stands or a lift to safely access components. V-band clamps require specific torque specs (typically 40-45 ft-lbs) to prevent leaks. For complex piping modifications or turbo-to-DPF connections, professional installation is recommended as improper fitment can trigger fault codes or damage emissions components.

What's the difference between OEM and aftermarket elbows for my T680?

OEM elbows guarantee exact fit and typically use aluminized steel construction with factory heat shields and mounting provisions. Aftermarket options often provide upgraded materials like stainless steel at competitive prices, but may require minor adjustments during installation. Quality aftermarket brands match OEM specifications for pipe diameter, bend angles, and overall length. Always verify that aftermarket parts maintain proper exhaust flow rates to avoid performance issues or check engine lights.

How do I know when my exhaust elbows or piping need replacement?

Common signs include visible rust holes, excessive soot buildup around joints, louder exhaust noise, or exhaust smell in the cab. Check for white or gray discoloration on pipes indicating overheating. Inspect clamps for looseness or corrosion, and look for carbon tracking at connection points. During pre-trip inspections, listen for exhaust leaks which sound like a ticking or hissing noise that increases with RPM. Replace components immediately if you notice any cracks, as exhaust leaks can damage other engine components and create safety hazards.